Interesting to read everyone's comments. My ground water is probably around 40 degrees so I can cool a 5 gallon batch down to 68 degrees fairly quickly (maybe 20-25 minutes). I usually go agitate my IC every 5 minutes or so. I wonder if adding some sort of motorized stirrer would work. Has anyone ever built one? Is hot side aeration an issue if trying to do something like this. It would be nice to have something to get a whirlpool in my kettle to try and get some of the trub from getting out into the fermenter.